On a positive note its unlikely you will repeat this incident (I hope) but remember this you said " I sit down and take my shot" well this is even more apt to happen when shooting from the prone position!
I have only been bumped by a scope and that was in large part to a guy who did what you did before I got to shoot and the amount of blood involved was impressive! The super-glue thing does work very well so keep a tube handy or learn not to crowd the scope. Personally if its a long gun it deserves a scope IMO they are just so much more efficient than open sites.

I have been whacked several times by scopes mounted on big bore rifles. Every time I got whacked by a scope each incident had something in common, a carbine stock. I have got to the point were I won't shoot a big bore rifle with a carbine stock. If the stock doesn't fit let it sit.

I've only done it once and that was shooting at my first deer with a marlin 35 rem. No damage or marks but did hurt at the time (13). Now, on my .30-06 I've never had an issue, even when shooting prone. Have to keep the gun tight to the shoulder and have a good plant on the stock. You want your body to move with the recoil, not the gun. Much less of a chance of that happening even with very little eye relief. I also wear a ball hat whenever I shoot. I seem to recall my hat getting knocked off a few times, but never got bit.

I'm with cottontop,I haven't ever experienced "scope eye" and have been shooting scoped rifles over 40 years. Eye relief and good shooting posture goes along way.

The couple of times I saw this happen(scope bite),seems the shooter would allow his shoulder to take all the recoil instead of their whole upper body absorbing the recoil. Once the the shoulder only comes back from recoil by itself without the whole upper body,you have allowed the scope/rifle to move with the shoulder which might be 2-3 inches depending on rifle recoil,you just lost your eye relief.

Thanks for posting and bringing this to shooters attention,hope you're doing better today.